Process-memory disclosure via crafted image parsing
Published May 8, 2023 · Updated Jan 29, 2025
Memory-handling flaw in Apple FontParser allows attackers to disclose process memory by processing a maliciously crafted image. FontParser performs an undisclosed incorrect memory operation while decoding attacker-controlled image data; Apple has not published the affected function or access boundary. Exploitation requires a user or application to process the image, and the documented consequence is limited to contents of the affected process's memory.
Summary
What happened
Memory-handling flaw in Apple FontParser allows attackers to disclose process memory by processing a maliciously crafted image. FontParser performs an undisclosed incorrect memory operation while decoding attacker-controlled image data; Apple has not published the affected function or access boundary. Exploitation requires a user or application to process the image, and the documented consequence is limited to contents of the affected process's memory.
The record
- CVE
- CVE-2023-27956
- Published
- May 8, 2023
- Updated
- Jan 29, 2025
- Vendor
- Apple
- Product
- iOS and iPadOS
- Classifications
- CWE-120, T1204.002
- Attack vector
- local
- Privileges
- unauthenticated
Timeline
How it unfolded
- May 8, 2023CVE publishedPublication date reported by the CVE source.
- Jan 29, 2025Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=unspecified <15.7
- Affected versionversion=unspecified <16.4
What conditions does exploitation require?
What is affected?
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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